LOL, never seen that attempted, thats got to be a sight to see.
http://www.waymarking.com/wm/details.aspx?f=1&guid=45f2320e-f613-4f00-ae1a-2869d9e72881
To really get the full effect, it helps to see it from I-40
Somebody installed one of these in Sonoma. You would never know it was fake unless you really looked close.